Metallicity-PAH Relation of MIR-selected Star-forming Galaxies in AKARI North Ecliptic Pole-wide Survey

被引：6

作者：

Shim, Hyunjin ^{[1
]}

Hwang, Ho Seong ^{[2
,3
]}

Jeong, Woong-Seob ^{[4
]}

Toba, Yoshiki ^{[5
,6
,7
]}

Kim, Minjin ^{[8
]}

Kim, Dohyeong ^{[9
]}

Song, Hyunmi ^{[10
]}

Hashimoto, Tetsuya ^{[11
]}

Nakagawa, Takago ^{[12
]}

Nanni, Ambra ^{[13
]}

Pearson, William J. ^{[13
]}

Takagi, Toshinobu ^{[14
]}

机构：

[1] Kyungpook Natl Univ, Dept Earth Sci Educ, 80 Daehak ro, Daegu 41566, South Korea

[2] Seoul Natl Univ, Dept Phys & Astron, Astron Program, 1 Gwanak ro, Seoul 08826, South Korea

[3] Seoul Natl Univ, SNU Astron Res Ctr, 1 Gwanak ro, Seoul 08826, South Korea

[4] Korea Astron & Space Sci Inst, 776 Daedeok daero, Daejeon 34055, South Korea

[5] Natl Astron Observ Japan, 2 21 1 Osawa,Mitaka ku, Tokyo 1818588, Japan

[6] Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS NTU,1 Roosevelt Rd, Taipei 10617, Taiwan

[7] Ehime Univ, Res Ctr Space & Cosm Evolut, 2 5 Bunkyo cho, Matsuyama, Ehime 7908577, Japan

[8] Kyungpook Natl Univ, Dept Astron & Atmospher Sci, 80 Daehak ro, Daegu 41566, South Korea

[9] Pusan Natl Univ, Dept Earth Sci, 2, Busandaehak ro 63 beon gil, Busan 46241, South Korea

[10] Chungnam Natl Univ, Dept Astron & Space Sci, 99 Daehak ro, Daejeon 34134, South Korea

[11] Natl Chung Hsing Univ, Dept Phys, 145 Xingda Rd,South Dist, Taichung 402, Taiwan

[12] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, 3 1 1 Yoshinodai,Chuo ku, Sagamihara, Kanagawa 2525210, Japan

[13] Natl Ctr Nucl Res, ul Pasteura 7, PL-02093 Warsaw, Poland

[14] Japan Sci Forum, 3 2 1, Kandasurugadai,Chiyoda ku, Tokyo 1010062, Japan

来源：

ASTRONOMICAL JOURNAL | 2023年 / 165卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

Galaxy evolution (594); Infrared galaxies (790); Polycyclic aromatic hydrocarbons (1280); Spectral energy distribution (2129); Galaxy properties (615); POLYCYCLIC AROMATIC-HYDROCARBON; GAS DEPLETION TIME; INFRARED GALAXIES; NEARBY GALAXIES; MOLECULAR GAS; MIDINFRARED SPECTRA; INTERSTELLAR DUST; FORMATION RATES; OPTICAL SURVEY; SOURCE CATALOG;

D O I：

10.3847/1538-3881/aca09c

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the variation in the mid-infrared spectral energy distributions of 373 low-redshift (z < 0.4) star forming galaxies, which reflects a variety of polycyclic aromatic hydrocarbon (PAH) emission features. The relative strength of PAH emission is parameterized as qPAH, which is defined as the mass fraction of PAH particles in the total dust mass. With the aid of continuous mid-infrared photometric data points covering 7-24 mu m and far infrared flux densities, qPAH values are derived through spectral energy distribution fitting. The correlation between qPAH and other physical properties of galaxies, i.e., gas-phase metallicity (12 + log(O/H)), stellar mass, and specific star-formation rate (sSFR) are explored. As in previous studies, q(PAH) values of galaxies with high metallicity are found to be higher than those with low metallicity. The strength of PAH emission is also positively correlated with the stellar mass and negatively correlated with the sSFR. The correlation between q(PAH) and each parameter still exists even after the other two parameters are fixed. In addition to the PAH strength, the application of metallicity-dependent gas-to-dust mass ratio appears to work well to estimate gas mass that matches the observed relationship between molecular gas and physical parameters. The result obtained will be used to calibrate the observed PAH luminosity-total infrared luminosity relation, based on the variation of MIR-FIR SED, which is used in the estimation of hidden star formation.

引用

页数：14

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